/Engine/Plugins/Experimental/LandscapePatch/Source/LandscapePatch/Public/LandscapeTexturePatch.h
These need to be public so that we can take the internal textures and write them to external ones, but unclear whether we want to expose them to blueprints, since this is a fairly internal thing.
[UTexture2D](API\Runtime\Engine\Engine\UTexture2D) * GetHeightInternalTexture()